299 citations · 966 across the 66 of their papers we have counts for
6 papers · 1 filter
Imprint of f(R) gravity in the cosmic magnification
Didam Duniya, Amare Abebe, Alvaro de la Cruz-Dombriz +1
f(R) gravity is one of the simplest viable modifications to General Relativity: it passes local astrophysical tests, predicts both the early-time cosmic inflation and the late-time…
Perturbations in the interacting vacuum
Albert Munyeshyaka, Joseph Ntahompagaze, Tom Mutabazi +4
In this study, we present the evolution of cosmological perturbations in a universe consisting of standard matter and interacting vacuum. We use the covariant formalism in…
A cosmological model with time dependent , and viscous fluid in General Relativity
Rishi Kumar Tiwari, Alnadhief H. A. Alfedeel, Değer Sofuoğlu +2
In this paper, we investigate Bianchi type cosmological models with bulk viscous fluid and time varying cosmological and Newtonian parameters. The Einstein's field equa…
Large-scale structure power spectrum from scalar-tensor gravity
Joseph Ntahompagaze, Amare Abebe, Manasse R. Mbonye
This work deals with the computation of the power spectrum of large-scale structure using the dynamical system approach for a multi-fluid universe in scalar-tensor theory of gravit…
Dark-fluid constraints of shear-free universes
Amare Abebe
Integrability conditions arising from general irrotational fluid-flow considerations of a universe dominated by cosmic dark fluids will be investigated under special assumptions on…
Activity Report of the Second African Conference on Fundamental and Applied Physics, ACP2021
Kétévi A. Assamagan, Obinna Abah, Amare Abebe +38
The African School of Fundamental Physics and Applications, also known as the African School of Physics (ASP), was initiated in 2010, as a three-week biennial event, to offer addit…